Method and system for sharing multiple antennas in mobile devices

ABSTRACT

A wireless device may comprise a plurality of antennas that may be utilized during communications via various wireless interfaces. The wireless interfaces may comprise mobile interfaces, wireless personal area network (WPAN) interfaces, and/or wireless local area network (WLAN). The plurality of antennas may be utilized during a communication via a wireless interface in the mobile device. The mobile device may switch among antennas in the plurality of antennas utilizing one or more RF switches to enable utilizing best path for transmitted and/or received RF signals during the wireless communication. The mobile device may also perform signal combining of RF signals received via the plurality of antenna, and to enable a receiving end to perform signal combining of RF signals transmitted via the mobile device. A multiple-input-multiple-output (MIMO) combiner may be utilized to perform signal combing; the MIMO combiner may utilize maximal ratio combining to perform signal combining and equalization.

CROSS-REFERENCE TO RELATED APPLICATIONS/INCORPORATION BY REFERENCE

This application is a continuation of U.S. application Ser. No.12/034,201, filed on Feb. 20, 2008, issued Jan. 1, 2012, now U.S. Pat.No. 8,095,083, which is incorporated herein by reference in itsentirety.

FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

[Not Applicable].

MICROFICHE/COPYRIGHT REFERENCE

[Not Applicable].

FIELD OF THE INVENTION

Certain embodiments of the invention relate to video processing. Morespecifically, certain embodiments of the invention relate to a methodand system for sharing multiple antennas in mobile devices.

BACKGROUND OF THE INVENTION

The field of wireless communication has seen dramatic growth the lastfew years. In today's world, most people use their wireless devices, forexample mobile phones, for various purposes, business and personal, on aconstant and daily basis. Society is truly becoming a wireless one. Alot of wireless solutions have been introduced, and have made tremendousstrides into everyday's life.

Mobile phones have become a near absolute necessity in today's world.While mobile technology originally evolved from traditional land-basedcommunication technologies, and was merely intended to add an element ofmobility to the traditional telephony service, this technology has grownbeyond that initial purpose. Many modern mobile technologies, includingsuch technologies as GSM/GPRS/EDGE, UMTS, and CDMA2000, incorporatesubstantial data capabilities. Most of today's mobile services comprisesuch features as text messaging, audio/video streaming, and webbrowsing. Modern mobile devices (phones) may be utilized to supportadditional services via other wireless interfaces; for example, wirelesspersonal area networks (WPAN) and/or wireless local area network (WLAN)interfaces.

The use of wireless personal area networks (WPAN) has been gainingpopularity in a great number of applications because of the flexibilityand convenience in connectivity they provide. WPAN systems generallyreplace cumbersome cabling and/or wiring used to connect peripheraldevices and/or mobile terminals by providing short distance wirelesslinks that allow connectivity within very narrow spatial limits(typically, a 10-meter range). WPAN may be based on standardizedtechnologies; for example Class 2 Bluetooth (BT) technology. While WPANmay be very beneficial for certain applications, other applications mayrequire larger service areas and/or capabilities.

To satisfy such needs, other technologies have been developed to providegreater wireless service. Wireless local area networks (WLAN) systemsmay operate within a 100-meter range, for example. In contrast to theWPAN systems, WLAN provide connectivity to devices that are locatedwithin a slightly larger geographical area, such as the area covered bya building or a campus, for example. WLAN systems are generally based onspecific standards, for example IEEE 802.11 standard specifications, andtypically operate within a 100-meter range, and are generally utilizedto supplement the communication capacity provided by traditional wiredLocal Area Networks (LANs) installed in the same geographic area as theWLAN system.

Some WLAN systems may be operated in conjunction with WPAN systems toprovide users with an enhanced overall functionality. For example,Bluetooth technology may be utilized to connect a laptop computer or ahandheld wireless terminal to a peripheral device, such as a keyboard,mouse, headphone, and/or printer, while the laptop computer or thehandheld wireless terminal is also connected to a campus-wide WLANnetwork through an access point (AP) located within the building. Also,mobile technology may allow use of the mobile phone as a form ofwireless modem that allows connecting a laptop, for example, to theinternet via a mobile network.

Further limitations and disadvantages of conventional and traditionalapproaches will become apparent to one of skill in the art, throughcomparison of such systems with some aspects of the present invention asset forth in the remainder of the present application with reference tothe drawings.

BRIEF SUMMARY OF THE INVENTION

A system and/or method is provided for sharing multiple antennas inmobile devices, substantially as shown in and/or described in connectionwith at least one of the figures, as set forth more completely in theclaims.

These and other advantages, aspects and novel features of the presentinvention, as well as details of an illustrated embodiment thereof, willbe more fully understood from the following description and drawings.

BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is a block diagram that illustrates an exemplary communicationsetup between a mobile device and a plurality of wireless systems, inaccordance with an embodiment of the invention.

FIG. 2A is a block diagram that illustrates an exemplary communicationsystem in a mobile device that enables selecting among a plurality ofavailable antennas, in accordance with an embodiment of the invention.

FIG. 2B is a block diagram that illustrates an exemplary communicationsystem in a mobile device that enables signal combining among aplurality of available antennas, in accordance with an embodiment of theinvention.

FIG. 2C is a block diagram that illustrates an exemplary signal combinerin a mobile device that enables signal combining among a plurality ofavailable antennas, in accordance with an embodiment of the invention.

FIG. 3 is an exemplary flow diagram for sharing a plurality of antennasin a mobile device during wireless communication, in accordance with anembodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION

Certain embodiments of the invention may be found in a method and systemfor sharing multiple antennas in mobile devices. A wireless device maycomprise a plurality of antennas that may be utilized duringcommunications via various wireless interfaces. The wireless interfacesmay comprise mobile interfaces, wireless personal area network (WPAN)interfaces, and/or wireless local area network (WLAN). The plurality ofantennas may be utilized during a communication via one of multiplesupported wireless interfaces via the mobile device. The mobile devicemay switch among any of the plurality of antennas utilizing one or moreRF switches to enable utilizing the best path for handling transmittedand/or received RF signals during the wireless communication. The mobiledevice may also be enabled to perform combining of RF signals receivedvia the plurality of antennas, and to enable a receiving end device toperform signal combining of RF signals transmitted from the mobiledevice. A multiple-input-multiple-output (MIMO) combiner may be utilizedto perform signal combing; and the MIMO combiner may utilize maximalratio combining to perform signal combining and equalization.

FIG. 1 is a block diagram that illustrates an exemplary communicationsetup between a mobile device and a plurality of wireless systems, whichmay be utilized in accordance with an embodiment of the invention.Referring to FIG. 1, there is shown a mobile device 102, an accessorydevice 104, an access point 106, a distribution network 108, a wirelessnetwork 110, a mobile tower 112, a mobile network 114, a wireless link120, a mobile link 122, and a wireless personal area network (WPAN) link124.

The wireless network 110 may comprise a plurality of the access point106, the distribution network 108, and suitable logic, circuitry and/orcode that may enable communication via one or more wirelesstechnologies. Exemplary wireless technologies may comprise IEEE 802.11(WLAN) and variants thereof, and WiMAX (IEEE 802.16). The access point106 may comprise suitable logic, circuitry, and/or code that may beutilized to provide the necessary access infrastructure for the mobiledevice 102 to access the wireless network 110. The distribution network108 may comprise suitable logic, circuitry, and/or code that may beadapted to operate as a backbone network that may be responsible fortransport and link functionality for a plurality of access points withinthe wireless network 110. The wireless link 120 may comprise an RF linkthat may utilize, for example, a standardized technology for localwireless access. For example, the wireless link 120 may correspond to anIEEE 802.11 (WLAN) and/or WiMAX (IEEE 802.16) RF connection between themobile device 102 and the wireless network 110.

The mobile network 114 may comprise a plurality of the mobile towers 112and/or base stations, and suitable logic, circuitry and/or code that mayenable via a cellular technology. For example, the mobile network maycomprise CDMA, WCDMA, CDMA2000, HSDPA, GSM, GPRS, EDGE, and/or UMTSinfrastructure. The mobile tower 112 may comprise suitable logic,circuitry, and/or code that may be utilized to provide the necessaryover the air access for the mobile device 102 to communicate with and/orvia the mobile network 114. The mobile link 122 may comprise an RF linkthat may utilize, for example, a standardized cellular technology. Forexample, the mobile link 122 may correspond to a UMTS RF connectionbetween the mobile device 102 and the mobile network 114.

The accessory device 104 may comprise suitable logic, circuitry and/orcode that may enable performing some accessory functionality inconjunction with the use of the mobile device 102. For example, theaccessory device 104 may comprise a hands-free headset. The mobiledevice 102 may communicate with the accessory device 104 via ashort-range link such as WPAN link 124, for example. Other links such asZigBee and an infrared link may be utilized The WPAN link 124 maycomprise an RF link that may utilize, for example, a standardizedtechnology for inter-device short range communication. For example, theWPAN link 124 may correspond to a Bluetooth and/or ZigBee RF connectionbetween the accessory device 104 and the mobile device 102.

The mobile device 102 may comprise suitable logic, circuitry and/or codethat may enable performing wireless communication via a plurality ofwireless interfaces. For example, the mobile device 102 may be utilizedto perform voice, video and/or text message peer-to-peer communicationwith other communication devices, mobile and/or land-based. The mobiledevice 102 may comprise, for example, a cellular phone that may beutilized to perform mobile communication via the mobile network 114. Themobile device 102 may also comprise suitable logic, circuitry and/orcode that may enable performing additional functionality comprising, forexample, Internet browsing, video and/or audio recording and/or playing.For example, the mobile device 102 may comprise a digital camera thatmay enable generating sill pictures and/or video streams. Also, themobile device 102 may comprise a microphone that may enable generationof audio recordings. The mobile device 102 may also comprise suitablelogic, circuitry and/or code that may enable utilizing the wirelessnetwork 110. For example, the wireless device 102 may be utilized as amodem that may enable a laptop to access the wireless network 110.

In operation, the mobile device 102 may utilize the wireless link 110 toaccess the wireless network 110 via the access point 106. The mobiledevice 102 may also utilize the mobile link 122 to access the mobilenetwork 114 via the mobile tower 112 and the mobile device 102 mayutilize the accessory device 104 via the WPAN link 124. The mobiledevice 102 may comprise a plurality of antennas that may be enableaccess to the mobile network 114, the wireless network 110, and/or theaccessory device 104, via the mobile link 122, the wireless link 120,and/or the WPAN link 124, respectively.

While the antennas utilized in the mobile device 102 may comprisevarying characteristics to suite each of the different wireless systemsavailable via the mobile device 102, some and/or all of the antennas maystill be utilized to support a wireless communication via each of theavailable wireless interfaces in the mobile device 102. For example, themobile device 102 may be utilized in conjunction with a UMTS network, aWiFi network, and/or a Bluetooth device. Within the UMTS network, adevice utilized as a 3G mobile platform may typically utilize adedicated antenna for UMTS function. In this regard, the antenna may beused, for example, to transmit and/or receive RF signal within the1.8-2.2 GHz frequency band. The 1885-2025 MHz frequency range may beutilized for uplink communication and the 2110-2200 MHz range may beutilized for downlink. WiFi and/or the Bluetooth RF signals may betransmitted and/or received within the 2.4 GHz band. While the WiFitransmission and/or reception may be performed via Bluetooth antennas,the WiFi network may require larger and better performance antenna thanBluetooth antenna may enable because WiFi features may demand higherdata rates over longer distances. As such, the 2.4 GHz WiFi antennautilized in a mobile device, for example the mobile device 102, mayapproach the size and/or gain of a UMTS antenna.

Consequently, in an embodiment of the invention, antennas utilized forUMTS, WiFi, and/or Bluetooth may comprise sufficiently compatiblecharacteristics that may be enabled or disabled via suitable logic,circuit, and/or code may during UMTS, WiFi, and/or Bluetoothcommunication. The frequency separation between the UMTS bands and the2.4 GHz band, which may be utilized for Bluetooth and/or WiFitransmission and/or reception, is only ˜300-500 MHz. 2.4 GHz antennasutilized for Bluetooth and/or WiFi operation may be designed to alsosupport the UMTS frequency band. The mobile device 102 may be modifiedand/or configured via suitable logic, circuitry, and/or code may beutilized to enable improved to enable optimal transmission and/orreception of UMTS RF signals via any of the available antennas in themobile device 102. For example, it may determined, via the mobile device102, that the WiFi antenna and/or the Bluetooth antenna may provide amore optimal communication path as compared to the dedicated UMTSantenna, and as a result, the WiFi antenna and/or the Bluetooth antennamay be selected to perform UMTS RF transmission and/or reception. Also,a combination of the available antennas may be utilized to optimize UMTSoperation, wherein the signal-to-noise ration (SNR) may be improved, forexample, by enabling use of diversity techniques via the plurality ofthe antennas. For example, it may determined, via the mobile device 102,that UMTS RF transmission and/or reception may be performed via WiFiantenna and/or the Bluetooth antenna, in conjunction with the dedicatedUMTS antenna, to facilitate more optimal communication due to spatialdiversity signal combining.

While the invention may be described based on UMTS, Bluetooth, and WiFi,the invention need not be limited to such combination. Rather, theinvention may also be embodied substantially the same way in any mobiledevice that comprises a plurality of antennas corresponding to pluralityof wireless interfaces, protocols and/or standards, and any combinationof the plurality of antennas may be configured to enable optimalcommunication.

FIG. 2A is a block diagram that illustrates an exemplary communicationsystem in a mobile device that enables selecting among a plurality ofavailable antennas, in accordance with an embodiment of the invention.Referring to FIG. 2A, there is shown a communication system 200, a UMTSRF transceiver 202, a Bluetooth RF transceiver 204, an antenna 206 a, anantenna 206 b, an RF switch 208, a processor 210, a memory 212, and abaseband processor 214.

The communication system 200 may comprise the UMTS RF transceiver 202,the Bluetooth RF transceiver 204, the antennas 206 a and 206 b, the RFswitch 208, the processor 210, the memory 212, and the basebandprocessor 214. The communication system 200 may also comprise suitablelogic, circuitry, and/or code that may enable receiving, transmitting,and processing RF signals. For example, the communication system 200 maybe integrated within a mobile device, for example the mobile device 102,to enable RF signal transmission and/or reception, during UMTS and/orBluetooth communication, for example, via the mobile link 122 and/or theWPAN link 124, respectively.

The antenna 206 a may comprise suitable logic, circuitry, and/or codethat may enable reception and/or transmission of RF signals; and theantenna 206 a may be communicatively coupled to the UMTS RF transceiver202. The UMTS RF transceiver 202 may comprise suitable logic, circuitry,and/or code that may enable processing of transmitted and/or receivedUMTS RF signals. For example, the UMTS RF transceiver 202 may enablereceiving RF signals at, for example, approximately the 1.8-2.2 GHzfrequency band. In this regard, the UMTS RF transceiver 202 may beenabled to generate signals, such as local oscillator signals, for thereception and processing of UMTS RF signals. The UMTS RF transceiver 202may be enabled to perform necessary conversions between received RFsignals and baseband frequency signals that may be processed via one ormore digital baseband processors, for example.

The UMTS RF transceiver 202 may be enabled to perform direct conversionof the received RF signals to a baseband frequency signal, for example.In some instances, the UMTS RF transceiver 202 may enableanalog-to-digital conversion of baseband signal components beforetransferring the components to digital baseband processors. The UMTS RFtransceiver 202 may also enable transmission of UMTS RF signals at, forexample, approximately 1.8-2.2 GHz frequency band. In this regard, theUMTS RF transceiver 202 may be enabled to generate signals, such aslocal oscillator signals, for the transmission and processing of UMTSsignals. The UMTS RF transceiver 202 may be enabled to perform necessaryconversions between baseband frequency signals, generated via digitalbaseband processors for example, and transmitted RF signals. In someinstances, the UMTS RF transceiver 202 may enable digital-to-analogconversion of baseband signals components.

The antenna 206 b may comprise suitable logic, circuitry, and/or codethat may enable reception and/or transmission of RF signals; and theantenna 206 b may be communicatively coupled to the RF switch 208. TheRF switch 208 may comprise suitable logic, circuitry, and/or code thatmay enable switching and/or routing of signals generated and/orprocessed via the UMTS RF transceiver 202 and/or the Bluetooth RFtransceiver 204, which may be transmitted and/or received via theantenna 206 b.

The Bluetooth RF transceiver 204 may comprise suitable logic, circuitry,and/or code that may enable processing of transmitted and/or receivedBluetooth RF signals, via the RF switch 208 and the antenna 206 b. Forexample, the Bluetooth RF transceiver 204 may enable receiving RFsignals at, for example, approximately the 2.4 GHz frequency band. Inthis regard, the Bluetooth RF transceiver 204 may be enabled to generatesignals, such as local oscillator signals, for the reception andprocessing of Bluetooth RF signals. The Bluetooth RF transceiver 204 maybe enabled to perform necessary conversions between received RF signalsand baseband frequency signals that may be proceed via digital basebandprocessors, for example. The Bluetooth RF transceiver 204 may performdirect down-conversion of the received RF signals to a basebandfrequency signal, for example. In some instances, the Bluetooth RFtransceiver 204 may enable analog-to-digital conversion of basebandsignal components before transferring the components to digital basebandprocessors. The Bluetooth RF transceiver 204 may also enabletransmission of Bluetooth RF signals via the RF switch 208 and/or theantenna 206 b at, for example, approximately 2.4 GHz frequency band. Inthis regard, the Bluetooth RF transceiver 204 may be enabled to generatesignals, such as local oscillator signals, for the transmission and/orprocessing of Bluetooth signals. The Bluetooth RF transceiver 204 may beenabled to perform necessary conversions between baseband frequencysignals, generated via digital baseband processors for example, andtransmitted RF signals. In some instances, the Bluetooth RF transceiver204 may enable digital-to-analog conversion of baseband signalscomponents.

The processor 210 may comprise suitable logic, circuitry, and/or codethat may enable control and/or data processing operations in thecommunication system 200. The processor 210 may be utilized to controlat least a portion of the memory 212, the UMTS RF transceiver 202, theBluetooth RF transceiver 204, and/or the RF switch 208. In this regard,the processor 210 may generate at least one signal for controllingoperations within the communication system 200. The processor 210 mayalso enable execution of applications that may be utilized by thecommunication system 200. For example, the processor 210 may executeapplications that may enable displaying and/or interacting with contentreceived via RF signals in the communication system 200. The processor210 may also comprise suitable logic, circuitry, and/or code that mayenable baseband frequency signals processing. In this regard, theprocessor 210 may process and/or handle signals received from the UMTSRF transceiver 202 and/or the Bluetooth RF transceiver 204; and/orsignals that may be transmitted via the UMTS RF transceiver 202 and/orthe Bluetooth RF transceiver 204.

The memory 212 may comprise suitable logic, circuitry, and/or code thatmay enable storage of data, code, and/or other information utilized bythe communication system 200. For example, the memory 212 may beutilized for storing processed data generated, and/or execution codethat may be utilized by the processor 210. The memory 212 may also beutilized to store information, such as configuration information, thatmay be utilized to control the operation of at least a portion of thecommunication system 200. For example, the memory 212 may compriseinformation necessary to configure the UMTS RF transceiver 202 and/orthe Bluetooth RF transceiver 204, to enable reception and/ortransmission of RF signals in appropriate frequency bands.

The baseband processor 214 may comprise suitable logic, circuitry,and/or code that may be adapted to process received baseband signals viaRF transceivers. The baseband processor 214 also may comprise suitablelogic, circuitry, and/or code that may be adapted to process basebandsignals for transmission via RF transceivers. For example, the basebandprocessor 214 may be utilized to process baseband signals transmittedand/or received via the UMTS RF transceiver 202 and/or the Bluetooth RFtransceiver 204 in the communication system 200. Although the basebandprocessor 214 may be depicted as a single block, the invention need notbe so limited. Accordingly, other embodiments of the invention maycomprise a plurality of baseband processors for processing signals toand/or from available RF transceivers.

In operation, the communication system 200 may enable RF transmissionand/or reception pertaining to different interfaces and/or protocols.The processor 210, the baseband processor 214, and the memory 212 may beutilized to control and support RF communication and/or signalprocessing via the communication system 200. For example, UMTS RFsignals may be received and/or transmitted via the antenna 206 a and theUMTS RF transceiver 202. The received UMTS RF signals may be convertedfrom/to baseband signals, which may be processed via the basebandprocessor 214. Similarly, Bluetooth RF signals may be received and/ortransmitted via the antenna 206 b, the RF switch 208, and the BluetoothRF transceiver 204. The received Bluetooth RF signals may be convertedfrom/to baseband signals, which may be processed via the basebandprocessor 214.

In an embodiment of the invention, the communication system 200 mayenable switching among available antennas during RF transmission and/orreception pertaining to a wireless interface. For example, the antennas206 a and 206 b may enable performing simultaneous RF transmissionand/or reception operations, pertaining to the UMTS interfaces. UMTS RFsignals may be received concurrently via antenna 206 a and the UMTS RFtransceiver 202; and via the antenna 206 b, the RF switch 208, and theUMTS RF transceiver 202. The processor 210, the memory 212, and/or thebaseband processor 214 may enable processing the received RF signals todetermine which path may provide better performance. Path determinationmay be performed dynamically wherein the two different antenna setupsmay be continually analyzed to enable selecting the path or paths thatmay provide improved or optimal reception and/or less interference,based on SNR and/or received signal strength indication (RSSI)measurements and/or calculations, for example. On the uplink, UMTS RFsignals corresponding to baseband signals generated via the basebandprocessor 214 for example, may be transmitted either via the UMTS RFtransceiver 202 and antenna 206 a, or via the UMTS RF transceiver 202,the RF switch 208, and the antenna 206 b. The determination of theantenna setup that may be utilized may be based on a determination ofthe path performance, which may be based on, for example, analyzing theperformance of the path on the downlink. For example, paths that may bedetermined to be optimal on the downlink, based on SNR and/or RSSImeasurements and/or calculations, may also be utilized in the uplink.Also, antenna gain adjustments may be performed in the communicationsystem 200 to enable performing switching among available antennasduring RF transmission and/or reception pertaining to a wirelessinterface.

FIG. 2B is a block diagram that illustrates an exemplary communicationsystem in a mobile device that enables signal combining among aplurality of available antennas, in accordance with an embodiment of theinvention. Referring to FIG. 2B, there is there is shown a communicationsystem 220, the Bluetooth RF transceiver 204, the antennas 206 a and 206b, the RF switch 208, the processor 210, the memory 212, the basebandprocessor 214, UMTS transceivers 222 a and 222 b, and amultiple-input-multiple-output (MIMO) combiner 224.

The communication system 220 may comprise the Bluetooth RF transceiver204, the antennas 206 a and 206 b, the RF switch 208, the processor 210,the memory 212, the baseband processor 214, the UMTS transceivers 222 aand 222 b, and the MIMO combiner 224 The communication system 220 mayalso comprise additional suitable logic, circuitry, and/or code that mayenable receiving, transmitting, and processing RF signals. For example,the communication system 220 may be integrated within a mobile device,for example, the mobile device 102, to enable RF signal transmissionand/or reception, during UMTS and/or Bluetooth communication, forexample, via the mobile link 122 and/or the WPAN link 124, respectively,wherein the signal combining may be performed, via the antennas 206 aand 206 b, during UMTS transmission and/or reception.

The Bluetooth RF transceiver 204, the antennas 206 a and 206 b, the RFswitch 208, the processor 210, the memory 212, and the basebandprocessor 214, may be substantially as described with respect to FIG.2B. Each of the UMTS transceivers 222 a and 222 b may be similar to theUMTS RF transceiver 202, substantially as described with respect to FIG.2A.

The MIMO combiner 224 may comprise suitable logic, circuitry, and/orcode that may enable performing RF signal combining. For example, theMIMO combiner may enable combining RF signals received via plurality ofantenna to perform spatial diversity in RF reception.

In operation, the communication system 220 may enable RF transmissionand/or receptions pertaining to different interfaces, substantiallysimilar to the communication system 200 as described in FIG. 2B. Thecommunication system 220 may also enable switching among availableantennas during RF transmission and/or reception pertaining to awireless interface, substantially similar to the communication system200 as described in FIG. 2B. In this regard, the antennas 206 a and 206b may enable performing simultaneous RF transmission and/or receptionoperations, pertaining to the UMTS interfaces. The UMTS RF signals maybe received concurrently via antenna 206 a and the UMTS RF transceiver222 a; and via the antenna 206 b, the RF switch 208, and the UMTS RFtransceiver 222 b. The processor 210, the memory 212, and/or thebaseband processor 214 may enable processing the received RF signals todetermine which path may provide better performance. Path determinationmay be performed dynamically wherein the two different antenna setupsmay be continually analyzed to enable selecting the path that mayprovide improved reception and/or less interference, based on SNR and/orRSSI calculations for example. On the uplink, UMTS RF signalscorresponding to baseband signals generated via the baseband processor214, for example, may be transmitted either via the UMTS RF transceiver222 a and antenna 206 a, or via the UMTS RF transceiver 222 b, the RFswitch 208, and the antenna 206 b. The determination of the antennasetup that may be utilized may be based on a determination of the pathperformance, which may be based on, for example, analyzing theperformance of the path on the downlink. For example, paths that may bedetermined to be optimal on the downlink, based on SNR and/or RSSIcalculations, may also be utilized in the uplink.

In an embodiment of the invention, the communication system 220 mayadditionally enable performing signal combining via available antennasduring RF transmissions and/or receptions pertaining to a wirelessinterface. For example, UMTS RF signals received and/or transmitted viathe antennas 206 a and 206 b may be combined during UMTS communications.In the downlink, UMTS RF signals may be received concurrently viaantenna 206 a and the UMTS RF transceiver 222 a and via the antenna 206b, the RF switch 208, and the UMTS RF transceiver 222 b. The receivedUMTS signals may then be combined via the MIMO combiner 224 and thecombined RF signals may subsequently be processed via the basebandprocessor 214. The use of the MIMO combiner 224 and/or basebandprocessor 214 may enable performing spatial diversity, for example, toreduce interference and/or to improve signal-to-noise ratio (SNR). Onthe uplink, UMTS RF signals, corresponding to baseband signals generatedvia the baseband processor 214, for example, may be transmittedsimultaneously via the UMTS RF transceiver 202 and antenna 206 a and viathe UMTS RF transceiver 202, the RF switch 208, and the antenna 206 b.This simultaneous transmission may enable a receiving entity, forexample the mobile tower 112, to utilize signal combining techniqueswhile receiving UMTS RF signals transmitted via the communication system220.

While the communication system 220 may be described based on UMTS andBluetooth transceivers, and with RF switching and combining of only onUMTS RF signals via available antennas, the invention need not be solimited. Accordingly, the communication system 220 may supportadditional or different wireless interfaces and/or protocols. Thecommunication system 220 may also be enabled to perform RF switchingand/or combining of any of supported wireless interfaces, via someand/or all of available antenna in the system. Also, antenna gainadjustments may be performed in the communication system 200 to enableperforming switching and/or signal combining among available antennasduring RF transmission and/or reception pertaining to a wirelessinterface.

FIG. 2C is a block diagram that illustrates an exemplary signal combinerin a mobile device that enables signal combining among a plurality ofavailable antennas, in accordance with an embodiment of the invention.Referring to FIG. 2C, there is there is shown a combiner system 240, amaximal ratio combining (MRC) equalizer 242, and an estimator 244.

The combiner system 240 may comprise the MRC equalizer 242 and theestimator 244 and may comprise suitable logic, circuitry, and/or codethat may enable performing RF signal combining operations. The combinersystem 240 may be integrated within the MIMO 224, for example, to enableperforming RF signal combining operations on UMTS RF signals in thecommunication system 220. The MRC equalizer 242 may comprise suitablelogic, circuitry, and/or code that may enable performing signalequalization based on maximal ratio combining of received RF signals.The estimator 244 may comprise suitable logic, circuitry, and/or codethat may enable performing necessary signal processing estimationoperations on RF signals received and/or combined via the MRC equalizer242.

In operation, the combiner system 240 may enable maximal ratio combiningof a plurality of signals. The combiner system 240 may be utilized viathe MIMO 224, for example, to enable performing RF signal combiningoperations on UMTS RF signals in the communication system 220. The RFsignals corresponding to a single communication may be received via twodifferent paths, Path A and Path B. For example, in the communicationsystem 220, Path A may correspond to UMTS RF signals received via theantenna 206 a and the UMTS RF transceiver 222 a while Path B maycorrespond to UMTS RF signals received via the antenna 206 b, the RFswitch 208, and the UMTS RF transceiver 222 b.

The RF signals received, via Path A and Path B, in the MRC equalizer 242may be combined, based on maximal ratio combining techniques, andresultant signals may then be equalized. The signals may then be fedinto the estimator 244. The signals may then be adjusted in theestimator 244, wherein distortion caused by interference and/or noisemay be reduced in the resultant signals based on preprogrammed and/orempirical data.

In an embodiment of the invention where the combiner system 240 may beutilized in the communication system 220, the processor 210 and/or thememory 212 may control and/or manage combining, equalization, and/orestimation operations performed via the MRC equalizer 242 and/or theestimator 244. Additionally, the MRC equalizer 242 and/or the estimator244 may be reprogrammable, wherein data and/or code utilized duringoperations may be modifiable dynamically and/or prior to RF reception.

FIG. 3 is an exemplary flow diagram for sharing a plurality of antennasin a mobile device during wireless communication, in accordance with anembodiment of the invention. Referring to FIG. 3, there is shown a flowchart 300 comprising a plurality of exemplary steps, which may enableutilizing multiple shared antennas in a mobile device.

In step 302, a determination of availability of a plurality of antennain a mobile device may be performed. For example, in the mobile device102, may be determined whether plurality of antennas that may beutilized with the various supported wireless interfaces may beavailable. This determination may depend, for example, on suitability ofexisting antennas that may be dedicated for use with other wirelessprotocols based on proximity of frequency bands utilized with differentsupported wireless protocols. In instances where it is determined thatthere may not be a plurality of antennas, the plurality of exemplarysteps may terminate. Returning to step 302, in instances where it isdetermined that there may be a plurality of antennas; the plurality ofexemplary steps may proceed to step 304.

In step 304, it may be determined whether an existing plurality ofantennas may be utilized during a communication via a wireless interfacemay be performed. For example, in a mobile device, for example themobile device 102, that may comprise the communication system 220, itmay be determined whether the existing plurality of antennas, 206 a and206 b, may be utilized during UMTS communications. The transmissionand/or reception bands of the UMTS and Bluetooth interfaces may besufficiently close that antennas used in UMTS and Bluetoothcommunications may be used interchangeably, and/or with littlemodification in circuitry, logic, and/or code. Additionally, thedetermination of whether to the existing plurality of antennas may alsodepend on availability of one or more of the antennas. For example,while Bluetooth antennas may be utilized during UMTS communications,they may not may available where they may be utilized concurrently toperform Bluetooth communications. In instances where it is determinedthat an existing plurality of antennas may not be utilized during acommunication via a wireless interface, the plurality of exemplary stepsmay terminate. Returning to step 304, in instances where it isdetermined that an existing plurality of antennas may be utilized duringcommunication via a wireless interface; the plurality of exemplary stepsmay proceed to step 306.

In step 306, the plurality of antennas may be setup and/or utilizedduring a communication via a wireless interface. The plurality ofantennas may be utilized, for example, to switch between the antennas toenable utilizing best path, and/or to perform signal combining. Forexample, a mobile device that comprises the communication system 200 mayswitch between antennas 206 a and/or 206 b during UMTS RF signaltransmissions and/or receptions, substantially as described in FIG. 2A.A mobile device that comprises the communication system 220 may switchbetween antennas 206 a and/or 206 b during UMTS RF signal transmissionsand/or receptions, and/or may utilized the MIMO combiner 224 to enableperforming signal combining of UMTS RF signals transmitted and/orreceived via the antennas 206 a and 206 b; substantially as described inFIG. 2B.

Various embodiments of the invention may comprise a method and systemfor multiple shared antenna mobile devices. The wireless device 102 maycomprise a plurality of antennas, for example 206 a and 206 b, which maybe utilized during communications via various wireless interfaces. Thewireless interfaces may comprise mobile interfaces, comprising, forexample, CDMA, WCDMA, CDMA2000, HSDPA, GSM, GPRS, EDGE, and/or UMTSinterface; wireless personal area network (WPAN) interfaces, comprising,for example, Bluetooth and/or ZigBee; and/or wireless local area network(WLAN) comprising, for example, WiFi and/or WiMAX. The plurality ofantennas may be utilized during a communication via one of supportedwireless interfaces via the mobile device 102. The mobile device 102 mayswitch between antennas in the plurality of antenna 206 a and 206 b,utilizing the RF switch 208 for example, to enable utilizing best pathfor UMTS RF signals transmitted and/or received. The mobile device 102may also perform signal combining of RF signals received via theplurality of antenna 206 a and 206 b; and to enable a receiving end toperform signal combining of RF signals transmitted from the mobiledevice 102, via the plurality of antennas 206 a and 206 b. The MIMOcombiner 224 may enable signal combining, to facilitate performingspatial diversity, for example. The MIMO combiner 224 may utilize theMRC equalizer 242 to perform signal combining and equalization.

Another embodiment of the invention may provide a machine-readablestorage, having stored thereon, a computer program having at least onecode section executable by a machine, thereby causing the machine toperform the steps as described herein for multiple shared antenna mobiledevices.

Accordingly, the present invention may be realized in hardware,software, or a combination of hardware and software. The presentinvention may be realized in a centralized fashion in at least onecomputer system, or in a distributed fashion where different elementsare spread across several interconnected computer systems. Any kind ofcomputer system or other apparatus adapted for carrying out the methodsdescribed herein is suited. A typical combination of hardware andsoftware may be a general-purpose computer system with a computerprogram that, when being loaded and executed, controls the computersystem such that it carries out the methods described herein.

The present invention may also be embedded in a computer programproduct, which comprises all the features enabling the implementation ofthe methods described herein, and which when loaded in a computer systemis able to carry out these methods. Computer program in the presentcontext means any expression, in any language, code or notation, of aset of instructions intended to cause a system having an informationprocessing capability to perform a particular function either directlyor after either or both of the following: a) conversion to anotherlanguage, code or notation; b) reproduction in a different materialform.

While the present invention has been described with reference to certainembodiments, it will be understood by those skilled in the art thatvarious changes may be made and equivalents may be substituted withoutdeparting from the scope of the present invention. In addition, manymodifications may be made to adapt a particular situation or material tothe teachings of the present invention without departing from its scope.Therefore, it is intended that the present invention not be limited tothe particular embodiment disclosed, but that the present invention willinclude all embodiments falling within the scope of the appended claims.

What is claimed is:
 1. A method for selecting an antenna configurationin a wireless device, the method comprising: determining a firstreception performance of a particular antenna of a plurality of antennasof the wireless device, wherein each antenna of the plurality ofantennas is uniquely suited for transmission and reception utilizing awireless protocol of a plurality of different wireless protocols;performing antenna gain adjustment on at least two antennas of theplurality of antennas based on a wireless protocol of the plurality ofdifferent wireless protocols corresponding to the particular antenna;determining a second reception performance of an antenna configurationcomprising the at least two antennas of the plurality of antennas basedon reception of signals according to the wireless protocol of theplurality of different wireless protocols corresponding, to theparticular antenna; and selecting an antenna configuration for wirelesscommunication based on the first reception performance and the secondreception performance.
 2. The method according to claim 1, wherein theplurality of different wireless protocols comprises mobile interfaces,wireless personal area network (WPAN) interfaces, and/or wireless localarea network (WLAN) interfaces.
 3. The method according to claim 2,wherein the mobile interfaces comprise CDMA, WCDMA, CDMA2000, HSDPA,GSM, GPRS, EDGE, and/or UMTS interfaces.
 4. The method according toclaim 2, wherein the WPAN interfaces comprise Bluetooth and/or ZigBee.5. The method according to claim 2, wherein the WLAN interfaces compriseWiFi and/or WiMAX.
 6. The method according to claim 2, furthercomprising: selecting the at least two antennas for the determination ofthe second reception performance based on a proximity of frequency bandscorresponding to wireless protocols of the plurality of differentwireless protocols corresponding to each of the at least two antennas.7. The method according to claim 1, further comprising configuring thewireless device to perform transmission and/or reception of signals viathe selected antenna configuration.
 8. The method according to claim 1,wherein determining the second reception performance comprisesperforming spatial diversity signal combining on the signals receivedfrom the at least two antennas.
 9. The method according to claim 8,comprising utilizing Maximal Ratio Combining (MRC) to perform thespatial diversity combining.
 10. A wireless device for wirelesscommunication comprising: a plurality of antennas, wherein each antennaof the plurality of antennas is uniquely suited for transmission andreception utilizing a wireless protocol of a plurality, of differentwireless protocols; and one or more circuits configured to: determine afirst reception performance of a particular antenna of the plurality ofantennas; performing antenna gain adjustment on at least two antennas ofthe plurality of antennas based on a wireless protocol of the pluralityof different wireless protocols corresponding to the particular antenna;determine a second reception performance of an antenna configurationcomprising the at least two antennas of the plurality of antennas basedon reception of signals according to the wireless protocol of theplurality of different wireless protocols corresponding to theparticular antenna; and select an antenna configuration for wirelesscommunication based on the first reception performance and the secondreception performance.
 11. The wireless device of claim 10, wherein theplurality of different wireless protocols comprises mobile interfaces,wireless personal area network (WPAN) interfaces, and/or wireless localarea network (WLAN) interfaces.
 12. The wireless device of claim 11,wherein the one or more circuits are further configured to select the atleast two antennas for the determination of the second receptionperformance based on a proximity of frequency bands corresponding towireless protocols of the plurality of different wireless protocolscorresponding to each of the at least two antennas.
 13. The wirelessdevice of claim 10, wherein each antenna of the plurality of antennas isuniquely suited for transmission and reception utilizing one of CDMA,WCDMA, CDMA2000, HSDPA, GSM, GPRS, EDGE, UMTS, Bluetooth, ZigBee, WiFi,and WiMAX wireless protocols.
 14. The wireless device of claim 13,wherein the one or more circuits are further configured to select the atleast two antennas for the determination of the second receptionperformance based on a proximity of frequency bands corresponding towireless protocols of the plurality of different wireless protocolscorresponding to each of the at least two antennas.
 15. The wirelessdevice of claim 10, wherein the one or more circuits are furtherconfigured to configure the wireless device to perform transmissionand/or reception of signals via the selected antenna configuration. 16.The system according to claim 10, wherein the one or more circuits arefurther configured to determine the second reception performance basedon spatial diversity combining.
 17. The system according to claim 16,wherein the one or more circuits comprise a Maximal Ratio Combining(MRC) equalizer for performing the spatial diversity combining.
 18. Amethod for selecting an antenna configuration in a wireless device, themethod comprising: determining a first reception performance of aparticular antenna of a plurality of antennas of the wireless device,wherein each antenna of the plurality of antennas comprises uniquecharacteristics suited for transmission and reception utilizing awireless protocol of a plurality of different wireless protocols;determining a second reception performance of an antenna configurationcomprising at least two antennas of the plurality of antennas based onreception of signals according to a wireless protocol of the pluralityof different wireless protocols corresponding to the particular antenna,wherein the at least two antennas of the plurality of antennas areselected based on a proximity of frequency bands corresponding towireless protocols of the plurality of different wireless protocolscorresponding to each of the at least two antennas and the particularantenna; and selecting an antenna configuration for wirelesscommunication based on the first reception performance and the secondreception performance.
 19. A wireless device for wireless communicationcomprising: a plurality of antennas wherein each antenna of theplurality of antennas comprises unique characteristics suited fortransmission and reception utilizing a wireless protocol of a pluralityof different wireless protocols; and one or more circuits configured to:determine a first reception performance of a particular antenna of theplurality of antennas; determine a second reception performance of anantenna configuration comprising at least two antennas of the pluralityof antennas based on reception of signals according to a wirelessprotocol of the plurality of different wireless protocols correspondingto the particular antenna, wherein the at least two antennas of theplurality of antennas are selected based on a proximity of frequencybands corresponding to wireless protocols of the plurality of differentwireless protocols corresponding to each of the at least two antennasand the particular antenna; and select an antenna configuration forwireless communication based on the first reception performance and thesecond reception performance.